If you order a double shot, the bartender typically serves that in a rocks glass and the pour is closer to 3 or 4 ounces of liquor. Shots tend to be more consistent, with all the liquors in the ...
If you were to order a straight-up shot at a bar ... re at a bar and want to truly taste the liquor in your mixed drink, you can always order a double, or you can also ask for more ice.